->''The Encyclopaedia Galactica defines a robot as "a mechanical apparatus designed to do the work of a man." The marketing division of the Sirius Cybernetics Corporation defines a robot as "Your Plastic Pal Who's Fun To Be With."''--> '''Literature/TheHitchhikersGuideToTheGalaxy1'''

Mechanical beings brought to life to serve man and hopefully not enslave him: Robots. Robots are one of the staples of science fiction literature, though they have spread beyond it into multiple other genres. So what is a robot? In fiction, a robot is usually a mechanical being that has been built in order to complete some task. The occasional use of the nonfictional variety of robots, which are basically complex machines, can also be seen in fiction in the form of [[ArtificialIntelligence non sentient]] devices such as a SurveillanceDrone. See also SlidingScaleOfRobotIntelligence.

The word's origin lies with Karel Čapek, a Czech writer and playwright who coined the term in 1921 with his play ''Theatre/RossumsUniversalRobots'' -- although ironically, Čapek's robots were ArtificialHumans, not mechanical beings. The name is derived from the Czech word ''robota'', meaning serf labor. (According to Čapek, it was his brother, Josef who suggested him the word). The concept of the "mechanical human" itself is much older; in memory of the tale from Myth/ClassicalMythology that Hephaestus, the God of smithcraft, had built machines that moved of their own accord and worked for him, such beings were referred to as ''automatons''[[note]]''automata'' if you insist on the Greek plural.[[/note]] before the word "robot" came into use.

In early fiction revolving around robots, they were generally laborers or workers who TurnedAgainstTheirMasters in a RobotWar. However, the author Creator/IsaacAsimov found this idea to be absurd: A robot would be designed to work for humans and would never be given the capacity to work against them, thus codifying [[ThreeLawsCompliant the three laws of robotics.]] Over the century, the use of robots in fiction has gone in multiple different directions, leading to a very widespread trope that is difficult to pin down exactly.

As a very common supertrope, [=Robot=] lists its subtropes below in index format. For an even more comprehensive list noting related tropes, see also RobotRollCall. Compare ArtificialHuman, SpaceshipGirl and the various {{Cyborg}}s. And of course, beware the RobotUprising.